(19)

(11)

EP 2 724 151 A2

(12)

(88) Date of publication A3: 11.04.2013 (43) Date of publication: 30.04.2014 Bulletin 2014/18 (21) Application number: 12794791.9 (22) Date of filing: 22.06.2012

(51) International Patent Classification (IPC):  G01N 27/404(2006.01) (86) International application number: PCT/US2012/043651 (87) International publication number: WO 2012/177952 (27.12.2012 Gazette 2012/52)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 21.06.2011 US 201161499255 P (71) Applicant: Dioxide Materials Inc. Champaign, IL 61820 (US)	(72) Inventors: MASEL, Richard I. Champaign, Illinois 61822 (US) ROSEN, Brian Champaign, Illinois 61820 (US) (74) Representative: Beyer, Andreas  Wuesthoff & Wuesthoff Patent- und Rechtsanwälte Schweigerstrasse 2 81541 München 81541 München (DE)